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Progress In Electromagnetics Research Letters
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COMPACT AND HIGH SELECTIVITY TRI-BAND BANDPASS FILTER USING MULTIPATH-EMBEDDED RESONATORS

By S. Yang, B. Wu, C. Zhu, Y. Wang, and C.-H. Liang

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Abstract:
In this paper, a novel compact tri-band bandpass filter (BPF) with compact circuit size and high passband selectivity has been presented and implemented using multipath-embedded resonator (MER). This filter includes two multipath-embedded stepped impedance resonators (SIRs), connected with stub-coupling at the symmetric plane. By tuning admittance ratio and length ratio of the multipath-embedded resonator, it can be designed at 1.84, 2.45, 3.05 GHz. Through internal edge-coupling and extemal zero-degree feed lines, a tri-band BPF can be achieved with compact circuit size, high passband selectivity and low insertion loss. The measured results validate the full-wave EM simulated results with good agreement.

Citation:
S. Yang, B. Wu, C. Zhu, Y. Wang, and C.-H. Liang, "Compact and High Selectivity Tri-Band Bandpass Filter Using Multipath-Embedded Resonators," Progress In Electromagnetics Research Letters, Vol. 50, 35-40, 2014.
doi:10.2528/PIERL14102108

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